The flyswatter looks like a series of Turks Head knots, which are a single strand knot. The knot at the back end might be a multi strand knot like a wall and crown, or something similar.
The lanyard for the bottle opener has a bunch of different knots. Starting from the bottle opener, it looks like 4 strand sennit, a wall and crown, or perhaps a bosun lanyard knot, then the thick area is probably crown knots, and then the loop looks like 4 strand sennit.
The handle starts with a loop of coxcombing, a Turks Head, I'm not sure what the handle is, it looks like a Turks Head at the base of the handle, and the last loop could be a Turks Head.
Without holding a knot in my hand, it can be difficult to determine the method of tying. Part of the art of our craft is being able to hide ends, and tie something that is truly difficult to determine how the heck that was done. The person that tied these knots was certainly a craftsman. They are beautiful examples of how sailors turned junk into art. The craft of knotting came about because sailors had time on their hands, and access to line that was otherwise useless to the operation of the ship. You have a very nice find there.